When a user is in the office, web pages are loading slowly on the user's phone. Which of the following best explains this issue?

Exceeding a data usage limit typically results in throttled speeds or additional charges applied by the cellular provider. However, this scenario describes slow loading while connected to a Wi-Fi network in the office, making this option irrelevant since it pertains to mobile data rather than network service quality.

While sluggish response time can describe the user experience of slow loading, it does not provide a root cause for the issue. It is a symptom of the problem rather than an explanation, as the actual issue stems from network service degradation rather than merely the response time itself.

Low storage space on the phone can lead to performance issues, such as slow app loading or processing. However, this would not specifically affect the loading speed of web pages when connected to a network. The problem at hand concerns connectivity, not the device's storage capacity, making this choice incorrect.